MSTest代码覆盖范围

如果我正在使用MSTest，有没有办法测试visual studio中的代码覆盖率？ 或者我必须购买NCover？

如果微软不提供内置工具来进行代码覆盖，那么NCover Enterprise是否物有所值，或者旧的测试版是否足够好？

编辑：VS产品的描述以及哪些包括代码覆盖率https://www.visualstudio.com/vs/compare/

如果您的VS版本不支持，可以使用TestDriven.NET（ http://testdriven.net/ ）。

Answer 1

是的，您可以在Visual Studio中找到代码覆盖率信息，前提是您拥有提供该function的Visual Studio版本，例如Team System。 在VS.NET中设置unit testing时，将创建localtestrun.testrunco​​nfig文件并将其作为解决方案的一部分添加。 双击此文件，找到对话框左侧的“代码覆盖率”选项。 选择要为其收集代码覆盖率信息的程序集，然后重新运行unit testing。 代码覆盖率信息将被收集并可用。 要获取代码覆盖率信息，请打开测试结果窗口，然后单击代码覆盖率结果按钮，这将打开包含结果的备用窗口。

Answer 2

MSTest包括代码覆盖率，至少它在VS的版本中有。 但是，您需要在testrunco​​nfig中启用检测，这只是丑陋而且是主要的PITA。

一个更容易的选择是使用TestDriven.NET ，它可以自动覆盖，甚至对于MSTest。 而且由于它使用了MSTest核心，你仍然可以获得所有的VS优点，例如着色（覆盖代码的红/蓝线）。 看到这里 （包括截屏video），或者因为图像上写了千言万语：

alt text http://sofzh.miximages.com/c%23/MSTestAndTeamCoverage_thumb1.gif

Answer 3

对于未来的读者：

哇，这不好玩。 我希望这可以帮助那些在互联网上的人。

请注意，“CodeCoverage.exe”的存在可能取决于您拥有的Visual Studio版本。 您可能必须在构建服务器中安装VS（某些增强版本）。

set __msTestExe=C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\MSTest.exe set __codeCoverageExe=C:\Program Files (x86)\Microsoft Visual Studio 14.0\Team Tools\Dynamic Code Coverage Tools\CodeCoverage.exe rem (the below is a custom C# console application, code seen below) set __customCodeCoverageMergerExe=CoverageCoverterConsoleApp.exe rem below exe is from https://www.microsoft.com/en-us/download/details.aspx?id=21714 set __msXslExe=C:\MyProgFiles\MsXslCommandLine\msxsl.exe REM the below calls will create the binary *.coverage files "%__codeCoverageExe%" collect /output:"D:\BuildStuff\TestResults\AAA_DynamicCodeCoverage.coverage" "%__msTestExe%" /testcontainer:"D:\BuildStuff\BuildResults\My.UnitTests.One.dll" /resultsfile:"D:\BuildStuff\TestResults\My.UnitTests.One.trx" "%__codeCoverageExe%" collect /output:"D:\BuildStuff\TestResults\BBB_DynamicCodeCoverage.coverage" "%__msTestExe%" /testcontainer:"D:\BuildStuff\BuildResults\My.UnitTests.Two.dll" /resultsfile:"D:\BuildStuff\TestResults\My.UnitTests.Two.trx" "%__codeCoverageExe%" collect /output:"D:\BuildStuff\TestResults\CCC_DynamicCodeCoverage.coverage" "%__msTestExe%" /testcontainer:"D:\BuildStuff\BuildResults\My.UnitTests.Three.dll" /resultsfile:"D:\BuildStuff\TestResults\My.UnitTests.Three.trx" rem below, the first argument is the new file, the 2nd through "N" args are the result-files from the three "%__codeCoverageExe%" collect above rem this will take the three binary *.coverage files and turn them into one .xml file "%__customCodeCoverageMergerExe%" "D:\BuildStuff\TestResults\DynamicCodeCoverage.merged.coverage.converted.xml" "D:\BuildStuff\TestResults\AAA_DynamicCodeCoverage.coverage" "D:\BuildStuff\TestResults\BBB_DynamicCodeCoverage.coverage" "D:\BuildStuff\TestResults\CCC_DynamicCodeCoverage.coverage" "%__msXslExe%" "D:\BuildStuff\TestResults\DynamicCodeCoverage.merged.coverage.converted.xml" "D:\BuildStuff\Xsl\VSCoverageToHtml.xsl" -o "D:\BuildStuff\TestResults\CodeCoverageReport.html" 

您还可以将3个UnitTests.dlls组合成一个调用

 REM the below calls will create the binary *.coverage files "%__codeCoverageExe%" collect /output:"D:\BuildStuff\TestResults\ZZZ_DynamicCodeCoverage.coverage" "%__msTestExe%" /testcontainer:"D:\BuildStuff\BuildResults\My.UnitTests.One.dll" /testcontainer:"D:\BuildStuff\BuildResults\My.UnitTests.Two.dll" /testcontainer:"D:\BuildStuff\BuildResults\My.UnitTests.Three.dll" /resultsfile:"D:\BuildStuff\TestResults\My.UnitTests.AllOfThem.trx" rem below, the first argument is the new file, the 2nd through "N" args are the result-files from the three "%__codeCoverageExe%" collect above rem this will take the one binary *.coverage files and turn them into one .xml file "%__customCodeCoverageMergerExe%" "D:\BuildStuff\TestResults\DynamicCodeCoverage.merged.coverage.converted.xml" "D:\BuildStuff\TestResults\ZZZ_DynamicCodeCoverage.coverage" "%__msXslExe%" "D:\BuildStuff\TestResults\DynamicCodeCoverage.merged.coverage.converted.xml" "D:\BuildStuff\Xsl\VSCoverageToHtml.xsl" -o "D:\BuildStuff\TestResults\CodeCoverageReport.html" 

VSCoverageToHtml.xsl

我还在互联网上找到了一些xsl。 （下面的3个链接几乎是相同的xsl）

http://codetuner.blogspot.com/2011_09_01_archive.html

http://jp.axtstar.com/?page_id=258

http://codetuner.blogspot.com/2011/09/convert-mstest-code-covarage-results-in.html

我在这里发布xsl“以防万一”这些URL将来会死掉。 将下面的xsl放在名为“VSCoverageToHtml.xsl”的文件中（如上所述）。

             
Code Coverage Report
  
 
 
 
Name
 
Blocks Covered
 
Blocks Not Covered
 
Coverage
 
 
        [+]                         -  [+]                         -   -  [+]                        -  -   -                       background-color:  #86ed60; #ffff99; #FF7979;    %   0.00%     

这是一个小的命令行工具来帮助。

https://www.microsoft.com/en-us/download/details.aspx?id=21714

 using System; using Microsoft.VisualStudio.Coverage.Analysis; using System.Collections.Generic; /* References \ThirdPartyReferences\Microsoft Visual Studio 11.0\Microsoft.VisualStudio.Coverage.Analysis.dll \ThirdPartyReferences\Microsoft Visual Studio 11.0\Microsoft.VisualStudio.Coverage.Interop.dll */ namespace MyCompany.VisualStudioExtensions.CodeCoverage.CoverageCoverterConsoleApp { class Program { static int Main(string[] args) { if (args.Length < 2) { Console.WriteLine("Coverage Convert - reads VStest binary code coverage data, and outputs it in XML format."); Console.WriteLine("Usage: ConverageConvert    ... "); return 1; } string destinationFile = args[0]; //destinationFile = @"C:\TestResults\MySuperMergedCoverage.coverage.converted.to.xml"; List sourceFiles = new List(); //files.Add(@"C:\MyCoverage1.coverage"); //files.Add(@"C:\MyCoverage2.coverage"); //files.Add(@"C:\MyCoverage3.coverage"); /* get all the file names EXCEPT the first one */ for (int i = 1; i < args.Length; i++) { sourceFiles.Add(args[i]); } CoverageInfo mergedCoverage; try { mergedCoverage = JoinCoverageFiles(sourceFiles); } catch (Exception e) { Console.WriteLine("Error opening coverage data: {0}", e.Message); return 1; } CoverageDS data = mergedCoverage.BuildDataSet(); try { data.WriteXml(destinationFile); } catch (Exception e) { Console.WriteLine("Error writing to output file: {0}", e.Message); return 1; } return 0; } private static CoverageInfo JoinCoverageFiles(IEnumerable files) { if (files == null) throw new ArgumentNullException("files"); // This will represent the joined coverage files CoverageInfo returnItem = null; string path; try { foreach (string sourceFile in files) { // Create from the current file path = System.IO.Path.GetDirectoryName(sourceFile); CoverageInfo current = CoverageInfo.CreateFromFile(sourceFile, new string[] { path }, new string[] { path }); if (returnItem == null) { // First time through, assign to result returnItem = current; continue; } // Not the first time through, join the result with the current CoverageInfo joined = null; try { joined = CoverageInfo.Join(returnItem, current); } finally { // Dispose current and result current.Dispose(); current = null; returnItem.Dispose(); returnItem = null; } returnItem = joined; } } catch (Exception) { if (returnItem != null) { returnItem.Dispose(); } throw; } return returnItem; } } } 

另见：

使用VS 2012动态代码覆盖率中的代码合并代码覆盖率文件

Answer 4

如果您没有Visual Studio终极版，则还可以使用此MSBuild任务生成代码覆盖率报告。

http://archive.msdn.microsoft.com/vscoveragetoxmltask